Which of the following statements regarding infertility and fertilization procedures is true?
A) Embryos fertilized through assisted reproductive technologies cannot be frozen for later use, as they degrade rapidly.
B) In GIFT, sperm are injected into an embryo in vitro, and the embryo is placed into the oviducts.
C) In IVF, fertilization occurs in a dish. The embryo is allowed to develop for several days, and then the embryo is placed into the uterus.
D) Cells cannot be removed from the blastocyst without harm to the embryo.
Answer: C
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Roots, stem, leaves, flower parts, and fruits are referred to as:
a. apical meristems. b. dermal tissues. c. vascular tissues. d. organs. e. ground tissues
Which of the following examples results from disruptive selection?
A) The birth weight at which newborn humans are most likely to survive and the average weight of newborn humans are about the same. B) There is an increase in antibiotic-resistant strains of bacteria. C) There is an increase in the number of different breeds of dog. D) Garter snakes with different coloration patterns behave differently when threatened.
Which of the following statements about plant embryo development is correct?
A. The plant hormone abscisic acid is important in the development of the shoot-root axis. B. The development of the shoot and root apical meristems is controlled independently. C. The protoderm establishes the procambium tissue in the young plant embryo. D. The suspensor forms from the shoot apical meristem before development of the root apical meristem.
Hich of the following is part of the pectoral girdle?
Femur Pelvis Scapula Skull